Depends on the windings. Synchronous motors have had windings designed for sq. w... | Hacker News

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		dom0 on Sept 17, 2017 \| parent \| context \| favorite \| on: As Electric Motors Impove, More Things Are Being E... Depends on the windings. Synchronous motors have had windings designed for sq. wave drive for many years now, prominently for stepper, servo and BLDC motors. These still use some filtering to reduce the insulation stresses.

Const-me on Sept 17, 2017 [–]

They use square waves for them because squares are much easier to make, not because they work better.

Good driver chips (e.g. https://www.trinamic.com/) still synthesize sinusoidal-like waves for these motors. It reduces noise and power consumption.

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